Warning: This article contains spoilers for the season 7 finale ofThe Flash.
The clash ended when Thawne stabbed the golden speedster.
Of course, villains are gonna villain, and Thawne immediately turned on Barry.

Candice Patton as Iris West-Allen and Grant Gustin as Barry Allen on ‘The Flash’.Bettina Strauss/The CW
But he ended up speeding into the night when he realized Barry was finally faster than him.
Thus, Barry and Iris (Candice Patton) were able to renew their vows in peace.
ENTERTAINMENT WEEKLY: Where did the idea to bring Reverse Flash back in this way come from?

John Wesley Shipp as Jay Garrick, Jordan Fisher as Bart/Impulse, Candice Patton as Iris, Grant Gustin as Barry/The Flash, Jessica Parker Kennedy as Nora/XS, and Michelle Harrison as Nora in the season 7 finale of ‘The Flash’.Bettina Strauss/The CW
ERIC WALLACE:I’ve had that idea for a year.
[Laughs] Like, “Just be patient.
He’s always going to be back.”

Jessica Parker Kennedy, Candice Patton, and Grant Gustin on ‘The Flash’.Bettina Strauss/The CW
He’s so dangerous that the Flash has to partner with his worst enemy to defeat this guy.
I told Karan, he flipped.
Tom’s been hiding this for nine months, it’s really hilarious.
Good for him for keeping the secret.
And what about the lightning-sword fight?
You could hear the heavens open up.
“That’s it!
That’s our lightning-sword battle!”
We’ve past the point of no return.
All right, double down!"
Then we decided to make it bigger.
Hopefully the end result is something that will be a very memorable sequence for years to come forFlashfans.
In the past you’ve said you had a multiseason plan when you took over as showrunner.
Was Bart’s [Jordan Fisher] introduction always part of that?
What made this the right time to bring that character in?
Yes, Bart has always been the plan.
Although ironically, we were originally going to introduce Bart in season 8, not season 7.
Then COVID happened and we had a whole bunch of time to think about how to reshape the season.
I realized, “Let’s pull that up.
Would there be a season 8 at that point?
So I also couldn’t take the chance.
I wanted to ensure at least Impulse got an appearance.
Fortunately, we did get an eighth season.
What made Jordan the right person for that role?
It’s a funny story.
The sun’s rising.
And he’s giving this great performance and his energy is so positive.
And I thought to myself right there, “This guy is just amazing.
I have to work with this person again.
I don’t know when, I don’t know how.”
He is my only choice.
He is my No.
1 but there’s no way we’ll get him because he’s famous now.”
We did, and to my pleasant surprise he was into it.
Next thing you know, Jordan was Impulse and it was a dream come true for me.
That’s when I knew we’d made the right decision, because it felt like synchronicity.
It felt like something special was happening.
Hopefully that came through in his two episodes.
Do you have plans to bring Bart and Nora back next year?
It’s just a matter of when and how they return.
Because they’re just so fantastic, we just can’t wait to have them back on the show.
No, Iris is not a speedster.
This is a one-time thing.
I won’t go any further.
Are you approaching season 8 as if it might be the last one?
So I’m just treating it as “Let’s tell the best season we can.”
That’s how we sort out our ideas by priority.
But I will say the whole gambit is open it’s wide open.
Ask me that question in three months.
Are you approaching this as a five-part story, or is it five standalone episodes?
It’s a five-part event.
We’re going to do what we always do, which is our graphic novel format.
We’ll be telling a self-contained story, no spoilers there.
But we’re just going to up the ante.
So this special event is designed to feel like a crossover but not be a crossover.
Obviously we don’t have the time and resources and all of that stuff.
The Flashwill return Tuesday, Nov. 16, at 8 p.m. ET/PT on the CW.